<template>
  <div class="list" ref='wrapper'>
    <div>
      <div class="area">
        <div class="title border-topbottom">当前城市</div>
        <div class="button-list">
          <div class="button-wraper">
            <div class="button">{{currentCity}}</div>
          </div>
        </div>
      </div>
      <div class="area">
        <div class="title border-topbottom">热门城市</div>
        <div class="button-list">
          <div class="button-wraper" v-for="item of hot" :key='item.id'>
            <div class="button" @click="handleCityCLick(item.name)">{{item.name}}</div>
          </div>
        </div>
      </div>
      <div class="area" v-for="(item, key) of cities" :key='key' :ref='key'>
        <div class="title border-topbottom">{{key}}</div>
        <div class="item-list">
          <div class="item border-bottom"
            v-for="innerItem of item"
            :key="innerItem.id"
            @click="handleCityCLick(innerItem.name)"
          >
            {{innerItem.name}}
          </div>
        </div>
      </div>

    </div>

  </div>
</template>

<script>
import { mapState, mapMutations } from 'vuex'
import Bscroll from 'better-scroll'
export default {
  name: 'CityList',
  props: {
    hot: Array,
    cities: Object,
    letter: String
  },
  computed: {
    ...mapState({
      currentCity: 'city'
    })
  },
  methods: {
    handleCityCLick (city) {
      this.changeCity(city)
      this.$router.push('/')
    },
    ...mapMutations(['changeCity'])
  },
  mounted () {
    this.scroll = new Bscroll(this.$refs.wrapper, {
      click: true
    })
  },
  watch: {
    letter () {
      if (this.letter) {
        const element = this.$refs[this.letter]
        this.scroll.scrollToElement(element)
      }
    }
  }
}
</script>

<style lang="stylus" scoped>
  @import '~styles/varibles.styl'
  .border-topbottom
    &:before
      border-color : #CCCCCC
    &:after
      border-color : #CCCCCC
  .border-bottom
    &:before
      border-color : #CCCCCC
  .list
    overflow : hidden
    position : absolute
    top : 1.58rem
    left : 0
    right : 0
    bottom : 0
    .title
      line-height : .54rem
      background : #eee
      padding-left : .2rem
      color : #666
      font-size : .26rem
    .button-list
      padding : .1rem .6rem .1rem .1rem
      overflow : hidden
    .button-wraper
      float : left
      width : 33.3%
      .button
        text-align :center
        margin : .1rem
        padding : .1rem 0
        border : .02rem solid #CCCCCC
        border-radius : .06rem
    .item-list
      .item
        line-height : .76rem
        padding-left : .2rem

</style>
